Apparatus for the production of luminous images and the like



M. CURIE AND M. E. VARINOIS. APPARATUS. FOR THE PRODUCTION OF LUMINOUS IMAGES AND THE LIKE.

APPLICATION HLED MAY 19. I920.

mm m I Patented Mfa "3@,1922,

' that the observer ma ration, by a projection of red rays said images or inscriptions drawn or trace MAURICE cram Ann MARCEL nnnns'r vanmors,

arrana'rns FOR THE PRODUCTIO or LUMINOUS Imagine rear cranes.

or PARIS, FRANCE.

AND THE LIKE.

Application filed May 19,

act description.

This invention has for its object a process for the production of any luminous images or inscriptions and its application to advertising purposes and cinematography.

It consists essentially in projecting, on the by means of a paint or of a varnish the base of which is formed of phosphorescent bodies, obscure rays 01' rays suificiently dark to be nearly invisible, for the purpose of producing'the permanent excitation. of the phosphorescent body and the luminous apparition, in 'a non lighted or feebly lighted place, of the invisible image or inscription traced on any board whatever by means of the phosphorescent paint.

The-invention consists also in projecting, on a panel uniformly covered with sulphide of" zinc or other phosphorescent. material, bundles of obscure (Roentgen rays) emitted by a projection apparatus in which theypass through covers constituted by photographic proofs (positive or negative) of the designs, inscriptions or other figures, producing, on

the panel, phosphorescentimages, inscriptions or other figures.

The invention also relates to an apparatus for carrying out thisprocess and in which the luminoussource emitting the obscure rays is provided with a screen for selecting the rays and with a device canalizing th filtered rays towards the board.

The said luminous source 1. preferably concealed from the view of the observer, so-

see-the luminous 1mage or projection wit out being able to realize how it is produced; the attraction of the observation and the surprise of the observer may be further increased by the sudden disappearance of the luminous image which is'caused, after an exposure of variable .du

emitte by the same source of light orby. any other source of light.

Twoforms of Specification of Letters Patent.

FranceMa-y 10, 1919), of i which the following is a full, clear, and ex- I 0, contains a source "lect the rays and (violet) or invisible rays permanent excitation of apparatus designed for the 1920; Serial nus sasn.

production of luminous images according to the process forming the subject-matter of the intention, are diagrammatically illustrated by way of example only, in the accompanying drawing, in which:

Figure 1 shows one apparatus and Figure 2 illustrates a modified form. Referring to Fig. 1, it will be seen that the apparatus images, inscriptions or other figures are made by means of a paint or of a varnish the baseof which is formed of phosphores cent bodies, such as sulphide of zinc for instance and of any other phosphorescent d bodies, such as sulphide ofcalcium, stron-,

tium, so as to permit of obtaining images in several colours.

A suitable lighting apparatus shown, in the example illustrated, as facing the board of light-b which ean'be constituted by a gas lamp or an incandescent or are electric lamp, or a mercury vapour;

lamp with glass or quarti tube.

This lamp 1) is enclosed'in a metal box 0 Patented Ma 30, 1922.

form of the present comprises a panel a, on which carrying, on one of its faces directed toi a screen (1 adapted to seto letoutside the box 0 only the rays capable of exciting-the phosphorescent product, without having'any 1njurious action on the latter, these rays being sufiiciently dark so as to be nearly invisible,

wards the board a,

such as green, blue, violet. or ultra-violet rays oreven invisible rays (Rontgen rays) The obscure rays thus filtered by the screen (I are canalized and means on the board a, so as to produce a.

or of any other phosphorescent product con- 'stituting theimage; design or inscription borne by the board mains phosphorescent as-long as the obscure rays aredi'rected on the same.

These rays are preferably directed on the board a by means 7 at the same'time to-thepublic-tlie presenceofthe source of light and prevents them from seeing how the luminous image isproduced, K

In the example illustrated in Fig. 2, the apparatus is constituted by a panel a uniformly covered with sulphide of zinc or any (1 phosphorescent materiahopposite which 18 0 directed by any suitable the sulphide of zinc,

a; thesaid image, re-

of a'shade which conceals sage of the entire mass of the pbscure or in- Y ment to suddenly disappear by projecting visible. rays issuin from the condenser-e, through photograp '0 slides f (positive or negative) of the designs, inscriptions and the like.

The arrival of the bundles of obscure or invisible rays on the panel uniformly-cow.

ered with phosphorescent material then roduces on the latter the apparition of p os-' phorescent images, inscriptions or designs.

7 can be advantageously used. for advertising purposes, in attraction places, such as cinema halls, without hindering the pro ection, as

well as in the street and, generally speaking,

in all laces feebly lighted at ni ht.

In t e particular case ofv app ication for advertising purposes, sensibly obscure ultra violet rays may preferably be used, so as to vertising matter; in this case the attention of'the observers might also be further attracted by causing the luminous advertiseon the latter red rays which might be emitdistinct source of light.

Finally in the case of application to cinematographlc projections, this apparatus might project, on the pro ection screen,-on-

one side of the projected scene, explanatory texts, thus'doing away with-the necessity of stopping the projection, as this is actually the'case. Q g k The above described apparatuses are of course given 0111 by wayof exam leand it is obvious that t a forms, materia s and dimensionsma be varied according to the "var ous app ications, without departing thereby from the scope of the invention. I

For the purpose ,of increasing the intensityv of the phosphorescence, phosphorescent bodies rendered radio active might also he paint or varnish,

.scription's are tracedby means of a paint. ,or' varnish the base "of 1 which is formed or v hosphorescent bodies,.'-any source of light ted bythe same lighting apparatus or by a ispectators,a screen I for selecting the rays,

arranged between .theisource of light and;

80 scriptio'ns or images are drawn by means used for the manufacture of the luminous Claims: v

1, An apparatus for carrying. out the process of production of luminous'images comprising a board on which the invisible designs, images or inscriptions are'traced by means of a paint or varnish-the base of which is formed of phosphorescent bodiesany source of light preferably concealed from the view of the spectators,a screen for selecting the rays, arranged betweenthe source of light and the boardccoveredwith invisible images or inscriptions traced by means of the phosphorescent paint, th said screen giving only assage to obscure orinvisible rays which, eing projected on t .the said board, produce the permanent em citation of the {phosphorescent paintwitll' which are drawn the invisible ima for scriptions and the apparition of uminous limagss' as long as the-projection of obscure or invisible rays lasts; a produce a progressive appearance of the adv 2. An apparatus for the preduction of luminous images comprising',- a board on which the'invisible designs, images or inreferably concealed from the viewof the the board on"which invi sible designs, in-

of a phosphorescent npaint' oaj 'varnish', the

prof

cent paint or varnish and the progressive ;apparition of luminous designs inscriptions, images or advertlsemen Signed by us this 26th (my or apps, 192a Mansion coma.

MARCEL ERNEST vaaqlno s,

said screen giving 0 y passage to sensibly obscure ultra-violet rays which being jected on the--hoard,"produoe the progressive exc ita 'tion of the invisible images drawn .on the board by means of the phosphores- 

